Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and the Nasdaq Stock Market:
Tyson Foods Inc., down 83 cents at $24.10
The meat company said that its second-quarter net income fell 42 percent. The company also cut its full-year revenue forecast.
Bridgepoint Education Inc., down 18 cents at $10.83
The for-profit college operator said that its first-quarter net income dropped 29 percent as student enrollments continued to fall.
Westlake Chemical Corp., up $6.49 at $88.94
The chemical company's net income rose 40 percent thanks to strong income from its olefins and vinyls units as well as lower costs.
WellCare Health Plans Inc., down 88 cents at $56.38
Shares of the Medicaid and Medicare provider fell after reporting last week that its first-quarter net income fell 58 percent.
Humana Inc., up $1.56 at $75.49
A J.P. Morgan analyst upgraded the insurer's stock rating, saying it should be able to grow its Medicare Advantage enrollment.
Google Inc., up $15.83 at $861.55
Shares of the Internet search company hit an all-time high of $861.85. The stock is up over 20 percent since the start of the year.
Tesco Corp., down 69 cents at $12.02
The oil and natural gas drilling service provider's first-quarter net income fell 39 percent, hurt by reduced North America rig activity.
3D Systems Corp., up $3.29 at $43.17
S&P Dow Jones Indices said that the printing company's stock is being added into its S&P MidCap 400 index.